Hydraulic jack pump



July 4, 1950 F. M. SIEDENBURG HYDRAULIC JACK PUMP Filed July 24, 1947INVENTOR; FRED M-SIEDENBUR c ATTORN EY Patented July 4, 1950 UNI TEDSTATES PATENT OF E- I Y I v 2,514,343

HYDRAULIC JACK PUMP Fred M-..Siedenburg,. Richmond Hill, N. Y.

Application July 24, 1947, SerialNo. 763,269

3 Claims. 1

This invention relates It is an object of'this-inventionwto provide a,hydraulic jack pump in which the fluid is contained in a hermeticallysealed reservoir, which willbeleak proof.

It is another object of this invention to provide-a hydraulic jack pumpwith aflexible reservoir, permitting a compact construction and that is.inexpensive to manufacture.

Itvisa further object of thisinvention" to protov hydraulic jack pumps.

vide a hydraulic jack pump that will operate in any and allpositions-efficiently.

. It. isa further object of the present invention to .provide a jackpump which has a flexible container for: servingas a fluid-reservoirwhereby the same may be expandedand contracted with the inwardandoutward flow of fluid and whereby there will be no opportunity for airto collect:

within. the fluid to interfere with the operation of the pump or jack towhich it may be connected.

It is. another. object of the present. invention to provide apumpadapted to berested upon the ground and wherein the pumping unitcomprises a simpleelement which isfitted into a container adapted tohouse the flexible reservoir and which has an operating-lever extendingfrom the opposite end of the pump. The pump being located externally ofthe casing and awhip piece extending over the casing to protect the sameand provide a substantial rest for the pump.

According to the invention, there is provided a pump element which isthreaded at one end andto. which is connected a-casing. The threadedprojection extends intothe casing and has a flexible reservoir connectedto the same into which the fluid is stored and retained for use to beforced under pressure by the pump to a jaclgelement remotely locatedfrom the pump. The flexible reservoir will expand and contract accordingto the contents of the fluid within the same and hence will allow noopportunity for air to be gathered into the reservoir. The casing whichis threadedly connected to the pump will give protection to the flexiblereservoir member.

A foot piece is extended over the casing and by means of the same it canbe retained on the ground while a lever located at the opposite end ofthe pump is worked back and forth. The lever connects with a piston rodwhich extends into the pump. The piston is made of flexible materialsuch as synthetic rubber and will draw fluid out of the flexiblereservoir and force it upwardly through the tube extending to the jack.A valve is turned when the fluid is to be returned to the flexiblereservoir.

For further comprehension of the invention. and of the objects andadvantagesthereoi, ref:- erence will be had to thefollowing descriptionand accompanying drawing and to the appended claims in which the variousnovel features of. the invention are more particularly set forth.

In the accompanying drawing forming amae terial part of this disclosure:

Fig. 1 is a Side elevational view of the pump with the operating leverextending upwardly therefrom and the pump resting in the position inwhich it is retained from being operated.

Fig. 2 is a transverse longitudinal cross sectional view taken on line2-2 of Fig. 1.

Fig. 3 is a vertical transverse cross sectional view taken on line 3-3of Fig. 1.

Fig. 4 is a partial longitudinal vertical cross. sectional view taken online 4-4 of Fig. 2.

Fig. 5 is a transverse vertical cross sectional view taken through thepump on line 5-5 of r Fig. 1.

Fig. 6 is a detail perspective view oithe flexible. reservoir.

The hydraulic jack pump, according to the I2 of synthetic rubbermaterial and a piston rod l3 extending outwardly through. a fitting I 4.in the rear end of the pump member HLuponthe base of'which is a packinggland I4. Above the.

fitting M is a stud IE to which an operating. arm l6'is pivoted asindicated at IT. The lower end of this arm pivotally. connects with thepiston rod 13 as indicated at IS. A long handle or lever i9 is fitted inthe arm I6. In the forward'end of the piston cylinder: ll there is aball valve 2| which opens as the piston I2 is drawn outwardly. wherebyto draw in a charge of fluid from a flexible and expansible reservoirsack 22 secured around a projection 23 by an attaching ring 24. The sack22 is in the form of a bag or tube made of rubber, synthetic material orany flexible, nonporous material hereinafter referred to as a flexiblereservoir. The projection 23 also has threads 25 to which a casing 26 isattached. The casing 26 is provided with vent hole 26 and its purpose isto protect the flexible reservoir 22. This flexible reservoir 22willcontract as fluid is drawn from the same and will expand as fluidenters it. By having such a flexible reservoir, the air is preventedfrom entering the fluid as no air is permitted in the reservoir; alsothe reservoir, on contracting, maintains a constant contact upon thefluid.

In the pump member In there is a passageway 21 which is controlled by avalve 28. Normally the passageway 21 is closed so that fluid will passupwardly through a hose connection 29 attached to the side of the pumpmember H] to a jack element, not shown. When the valve 28 is loosened,the passageway 21 is opened and fluid will return through the flexiblehose connection 29 to the flexible reservoir 22.

Surrounding the casing 26 is a guard plate or sleeve 3| roughened on itsexterior, as indicated at 32, and which has a flat bottom 33 on whichthe pump is rested. A foot may be extended over the roughened portion 32to retain it on the 1 ground.

While I have illustrated and described the preferred embodiments of myinvention, it is to be understood that I do not limit myself to theprecise constructions herein disclosed and the right is reserved to allchanges and modifications coming within the scope of the invention asdefined in the appended claims.

Having thus described my invention, what I claim as new, and desire tosecure by United States Letters Patent is:

1. In a hydraulic jack pump having a pump member formed with a cylinderhousing a reciprocal piston and a passage continuing from the end of thecylinder to the adjacent end of the pump member and including a one-wayvalve arranged to permit fluid to be sucked into the cylinder when thepiston moves in one direction and a hose leading from the cylinder forthe discharge of liquid from the cylinder when the piston moves in theother direction, a collapsible reservoir for hydraulic fluid connectedwith the said adjacent end of the pump member in communication with theadjacent end of the passage, comprising a tubular sack of resilientmaterial having one end closed and its other end engaged over the saidadjacent end of the pump member, means securing the open end of saidsack to the said adjacent end of the pump member, a rigid casing engagedabout said sack and secured to the said adjacent end of said pump memberto protect said sack, said casing being oval-shaped in cross section,and a guard sleeve engaged over said casing with the opposite portionsof its inside face engaging oppcsite sides of said casing located onopposite sides of its plane of greatest width.

2. In a, hydraulic jack pump having a pump member formed with a cylinderhousing a reciprocal piston and a passage continuing from the end of thecylinder to the adjacent end of the pump member and including a one-wayvalve arranged to permit fiuidto be sucked into the cylinder when thepiston moves in one direction and a hose lead- 4 ing from the cylinderfor the discharge of liquid from the cylinder when the piston moves inthe other direction, a tubular sack of rubber having one end closed andits other end secured in position over the said adjacent end of the pumpmember to extend horizontally therefrom, a rigid casing oval-shaped incross-section engaged about said sack and secured to the said adjacentend i of said pump member to protect said sack, said casing having itsgreatest width arranged horizontally, and a guard sleeve substantiallyovalshaped in cross-section engaged over said casing with its greatestwidth parallel to the greatest width of said casing and with the innerfaces of its top and bottom walls in facial contact with the top andbottom of said casing.

3. In a hydraulic jack pump having a pump member formed with a cylinderhousing a reciprocal piston and a passage continuing from the end of thecylinder to the adjacent end of the pump member and including a one-wayvalve arranged to'permit fluid to be sucked into the cylinder when thepiston moves in one direction and a hose leading from the cylinder forthe discharge of liquidirom the cylinder when the piston moves in theother direction, a tubular sack of rubber; having one end closed and itsother end secured in position over the said adjacent end of the'pumpmember to extend horizontally therefrom, a rigid casing oval-shaped incrosssection engaged about said sack and secured to the said adjacentend of said pump member to protect said sack, said casing having itsgreatest width arranged horizontally, and a guard sleeve substantiallyoval-shaped in cross-section engaged over said casing with its greatestwidth parallel to the greatest width of said casing and with the innerfaces of its top and bottom walls in facial contact with the top andbottom of said casing, said guard sleeve being formed of metal andhaving its complete outer surface roughened.-

- FRED M. SIEDENBURG.

REFERENCES CITED The following references are of record'in the file ofthis patent:

UNITED STATES PATENTS

